While it's understandable that everyone is focusing more on how the converts get converted and how the hard maps get valued, but let's talk about lower maps a little.
We have *** Passionate (TV Size) which is valued the same as Dragons. I FCd Passionate with hard rock where I barely get an A on Dragons, with a low combo. Dragons is so much harder because of really odd rhythms and because it's kinda long compared to the TV Size thing.
Then you have Hades in the Heaven which is valued slightly above but then you have a couple of much easier maps, namely Night of Fire by lepidon which is a lot higher above. Certain pattern chain in the middle of the map make Hades really really hard to FC, while Night of Fire has quite simple patterns and is something I consider a beginner's map. Thank you for playing isn't that difficult either and it's even further above.
Also in the mid class you have Intersect Thunderbolt 7491's Oni which is below Ernst Oni. I highly disagree with this, despite Ernst being a bit more pattern heavy. The patterns in Ernst aren't difficult, it's just slightly a more dense map, but in Intersect Thunderbolt you have high speed pattern changes, namely a quite hard 1/3 stream to perform correctly due to it's bpm which contains multiple hand swaps.
Just some thoughts.